As seen in the sky before the battle of Milvian bridge by the Roman Emperor Constantine.

At the beginning the 4th century, the court of Roman Emperor Constantine (280-337) was forced to take refuge in Arles.

Perhaps fewer than a dozen states retain some vestige of a prohibition that has its roots in a decree by the Roman Emperor Constantine.

Roman Emperor Constantine the Great chose the site for the new metropolis and began construction.

Christianity became Armenia's official religion a decade before the conversion of the Roman Emperor Constantine.

The theory can be traced back to Roman Emperor Constantine the Great (324-337).

Construction began by orders of the Roman Emperor Constantine I between 318 and 322, and took about 30 years to complete.

It was made into a "public wrong" iniuria publica by the Roman Emperor Constantine.

Terracotta figurines and two coins related to Roman Emperor Constantine were found in this place.

St Helena was the mother of the Roman Emperor Constantine.